-- Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. -- -- This program is free software; you can redistribute it and/or modify -- it under the terms of the GNU General Public License as published by -- the Free Software Foundation; version 2 of the License. -- -- This program is distributed in the hope that it will be useful, -- but WITHOUT ANY WARRANTY; without even the implied warranty of -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -- GNU General Public License for more details. -- -- You should have received a copy of the GNU General Public License -- along with this program; if not, write to the Free Software -- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA DROP FUNCTION IF EXISTS ps_thread_stack; DELIMITER $$ CREATE DEFINER='mariadb.sys'@'localhost' FUNCTION ps_thread_stack ( thd_id BIGINT UNSIGNED, debug BOOLEAN ) RETURNS LONGTEXT CHARSET latin1 COMMENT ' Description ----------- Outputs a JSON formatted stack of all statements, stages and events within Performance Schema for the specified thread. Parameters ----------- thd_id (BIGINT UNSIGNED): The id of the thread to trace. This should match the thread_id column from the performance_schema.threads table. in_verbose (BOOLEAN): Include file:lineno information in the events. Example ----------- (line separation added for output) mysql> SELECT sys.ps_thread_stack(37, FALSE) AS thread_stack\\G *************************** 1. row *************************** thread_stack: {"rankdir": "LR","nodesep": "0.10","stack_created": "2014-02-19 13:39:03", "mysql_version": "5.7.3-m13","mysql_user": "root@localhost","events": [{"nesting_event_id": "0", "event_id": "10", "timer_wait": 256.35, "event_info": "sql/select", "wait_info": "select @@version_comment limit 1\\nerrors: 0\\nwarnings: 0\\nlock time: ... ' SQL SECURITY INVOKER NOT DETERMINISTIC READS SQL DATA BEGIN DECLARE json_objects LONGTEXT; /*!50602 -- Do not track the current thread, it will kill the stack UPDATE performance_schema.threads SET instrumented = 'NO' WHERE processlist_id = CONNECTION_ID(); */ SET SESSION group_concat_max_len=@@global.max_allowed_packet; -- Select the entire stack of events SELECT GROUP_CONCAT(CONCAT( '{' , CONCAT_WS( ', ' , CONCAT('"nesting_event_id": "', IF(nesting_event_id IS NULL, '0', nesting_event_id), '"') , CONCAT('"event_id": "', event_id, '"') -- Convert from picoseconds to microseconds , CONCAT( '"timer_wait": ', ROUND(timer_wait/1000000, 2)) , CONCAT( '"event_info": "' , CASE WHEN event_name NOT LIKE 'wait/io%' THEN REPLACE(SUBSTRING_INDEX(event_name, '/', -2), '\\', '\\\\') WHEN event_name NOT LIKE 'wait/io/file%' OR event_name NOT LIKE 'wait/io/socket%' THEN REPLACE(SUBSTRING_INDEX(event_name, '/', -4), '\\', '\\\\') ELSE event_name END , '"' ) -- Always dump the extra wait information gathered for statements , CONCAT( '"wait_info": "', IFNULL(wait_info, ''), '"') -- If debug is enabled, add the file:lineno information for waits , CONCAT( '"source": "', IF(true AND event_name LIKE 'wait%', IFNULL(wait_info, ''), ''), '"') -- Depending on the type of event, name it appropriately , CASE WHEN event_name LIKE 'wait/io/file%' THEN '"event_type": "io/file"' WHEN event_name LIKE 'wait/io/table%' THEN '"event_type": "io/table"' WHEN event_name LIKE 'wait/io/socket%' THEN '"event_type": "io/socket"' WHEN event_name LIKE 'wait/synch/mutex%' THEN '"event_type": "synch/mutex"' WHEN event_name LIKE 'wait/synch/cond%' THEN '"event_type": "synch/cond"' WHEN event_name LIKE 'wait/synch/rwlock%' THEN '"event_type": "synch/rwlock"' WHEN event_name LIKE 'wait/lock%' THEN '"event_type": "lock"' WHEN event_name LIKE 'statement/%' THEN '"event_type": "stmt"' WHEN event_name LIKE 'stage/%' THEN '"event_type": "stage"' WHEN event_name LIKE '%idle%' THEN '"event_type": "idle"' ELSE '' END ) , '}' ) ORDER BY event_id ASC SEPARATOR ',') event INTO json_objects FROM ( /*!50600 -- Select all statements, with the extra tracing information available (SELECT thread_id, event_id, event_name, timer_wait, timer_start, nesting_event_id, CONCAT(sql_text, '\\n', 'errors: ', errors, '\\n', 'warnings: ', warnings, '\\n', 'lock time: ', ROUND(lock_time/1000000, 2),'us\\n', 'rows affected: ', rows_affected, '\\n', 'rows sent: ', rows_sent, '\\n', 'rows examined: ', rows_examined, '\\n', 'tmp tables: ', created_tmp_tables, '\\n', 'tmp disk tables: ', created_tmp_disk_tables, '\\n', 'select scan: ', select_scan, '\\n', 'select full join: ', select_full_join, '\\n', 'select full range join: ', select_full_range_join, '\\n', 'select range: ', select_range, '\\n', 'select range check: ', select_range_check, '\\n', 'sort merge passes: ', sort_merge_passes, '\\n', 'sort rows: ', sort_rows, '\\n', 'sort range: ', sort_range, '\\n', 'sort scan: ', sort_scan, '\\n', 'no index used: ', IF(no_index_used, 'TRUE', 'FALSE'), '\\n', 'no good index used: ', IF(no_good_index_used, 'TRUE', 'FALSE'), '\\n' ) AS wait_info FROM performance_schema.events_statements_history_long WHERE thread_id = thd_id) UNION -- Select all stages (SELECT thread_id, event_id, event_name, timer_wait, timer_start, nesting_event_id, null AS wait_info FROM performance_schema.events_stages_history_long WHERE thread_id = thd_id) UNION */ -- Select all events, adding information appropriate to the event (SELECT thread_id, event_id, CONCAT(event_name , IF(event_name NOT LIKE 'wait/synch/mutex%', IFNULL(CONCAT(' - ', operation), ''), ''), IF(number_of_bytes IS NOT NULL, CONCAT(' ', number_of_bytes, ' bytes'), ''), IF(event_name LIKE 'wait/io/file%', '\\n', ''), IF(object_schema IS NOT NULL, CONCAT('\\nObject: ', object_schema, '.'), ''), IF(object_name IS NOT NULL, IF (event_name LIKE 'wait/io/socket%', -- Print the socket if used, else the IP:port as reported CONCAT(IF (object_name LIKE ':0%', @@socket, object_name)), object_name), ''), /*!50600 IF(index_name IS NOT NULL, CONCAT(' Index: ', index_name), ''),*/'\\n' ) AS event_name, timer_wait, timer_start, nesting_event_id, source AS wait_info FROM performance_schema.events_waits_history_long WHERE thread_id = thd_id)) events ORDER BY event_id; RETURN CONCAT('{', CONCAT_WS(',', '"rankdir": "LR"', '"nodesep": "0.10"', CONCAT('"stack_created": "', NOW(), '"'), CONCAT('"mysql_version": "', VERSION(), '"'), CONCAT('"mysql_user": "', CURRENT_USER(), '"'), CONCAT('"events": [', IFNULL(json_objects,''), ']') ), '}'); END$$ DELIMITER ;